文档介绍：本科毕业设计说明书
110KV变压器继电保护系统设计
110KV TRANSFORMER PROTECTION SYSTEM DESIGN
学院(部):电气与信息工程学院
110KV变压器继电保护系统设计
摘要
本设计首先对电力工业发展、电力系统的概念和变电站的设计等做了一个初步的概括。然后进行变电站的负荷计算和无功补偿计算等等。再利用结果对主变压器台数和容量进行选择和主结线方案的确定。其中对主接线的选择做了较为详细的说明。选择过电流保护,对电网进行短路电流计算,包括适中电流的正序、负序、零序电流的短路计算,整定电流保护的整定值。在过电流保护不满足的情况下,相间故障选择距离保护,接地故障选择零序电流保护,同时对距离保护、零序电流保护进行整定计算。其中电器设备的选择主要包括:断路器、隔离开关、PT、CT、支柱绝缘子、套管、母线导体、避雷器、电抗器、高压熔断器等。
关键词:变电站,继电保护,短路计算,设备选型
110KV TRANSFORMER PROTECTION SYSTEM DESIGN
ABSTRACT
The design is first on the development of the power industry, power system substation design concepts and made a preliminary summary. Then substation load calculation and reactive pensation calculations and so on. And then use the results to the number of units on the main transformer and capacity to select and determine the main wiring scheme. One of the main terminal of choice to do a more detailed overcurrent protection, short-circuit current calculation on the grid, including the moderate current positive, negative and zero sequence current short circuit calculation, setting current protection setting value. Over-current protection is not satisfied in the case, phase fault distance protection options, select the zero sequence ground fault current protection, while the distance protection for zero sequence current protection setting calculation. The selection of electrical equipment which include: circuit breakers, disconnectors, PT, CT, insulators, bushings, bus conductors, surge arresters, reactors, high voltage fuses, etc.
KEYWARDS:substation, relay protection, short circuit calculations, equipment selection
目录
摘要 I
ABSTRACT II
1
1
110kV变电站发展现状 2
3
2电气主接线的设计 4
4
主接线设计原则 4
主接线选择 5
3 主变压器的选择 6
主变压器的选择原则 6
主变压器台数的选择 6
主变压器容量的选择 6
主变压器型式的选择 7
绕组数量和连接形式的选择 7
主变压器选择结果 8
4 所用电设计 9
所用变选择 9
110KV变电站主接线图 10
5 110KV变电站电气部分短路计算 11
变压器的各绕组电抗标幺值计算 11
10KV侧短路计算